JP5632446B2 - X-ray diagnostic equipment - Google Patents

Description

  The present invention relates to a three-dimensional road map in an X-ray imaging apparatus, and more particularly, to an image display technique linked with a three-dimensional road map.

  When inserting a wire into a patient's blood vessel for the purpose of treating the blood vessel, there is a 3D (three-dimensional) road map technology as a technology for assisting the insertion of the wire. The 3D roadmap technology displays a 3D image of a blood vessel such as a 3D volume rendering (hereinafter referred to as “3D-VR”) of a blood vessel as a mask image on a fluoroscopic image in an X-ray imaging apparatus such as digital fluorography. This is a technique for guiding the insertion of the wire.

  FIG. 9 is a diagram illustrating an example of a 3D road map. FIG. 4A shows a perspective image and a mask image before the 3D road map, and FIG. 4B shows a 3D road map image. As shown in FIG. 5B, in the 3D road map image, a fluoroscopic image and a mask image are displayed in an overlapping manner.

  In the 3D road map, it is necessary to match the geometric position of the fluoroscopic image and the geometric position of the mask image so that the blood vessels of the fluoroscopic image and the mask image overlap. Thus, a technique for accurately aligning the fluoroscopic image and the mask image has been developed (see, for example, Patent Document 1).

JP 2000-116789 A

  However, even when the fluoroscopic image and the mask image are accurately aligned, in the 3D roadmap image, depending on the angle of the arm, the shape of the blood vessel such as the blood vessel bifurcation may be difficult to see (see FIG. 1 described later). .

  The present invention has been made to solve such problems caused by the prior art, and makes it easy to see the shape of a blood vessel when the shape of the blood vessel, such as a blood vessel bifurcation, is difficult to see with only a 3D roadmap image. It is an object of the present invention to provide an X-ray imaging apparatus and a three-dimensional road map interlocking image display method that can be used.

In order to solve the above-described problems and achieve the object, the present invention is an X-ray diagnostic apparatus having a three-dimensional road map function, which includes a three-dimensional road map image in which a three-dimensional image of a blood vessel is superimposed on a fluoroscopic image. reception of accepting a first display means for displaying a second display means for displaying rotated separately from the three-dimensional road map image a three-dimensional image of the blood vessel, the stop instruction of the rotation of the 3-dimensional image of the blood vessel And an arm related to the direction of the blood vessel in association with the direction of the blood vessel displayed in the three-dimensional image of the blood vessel when the stop instruction is received Storage means for storing the difference between the angle of the arm and the angle of the arm related to the direction of the blood vessel displayed in the three-dimensional road map image .

In addition, the present invention is an X-ray diagnostic apparatus having a three-dimensional road map function, which displays a three-dimensional road map image in which a three- dimensional image of a blood vessel is superimposed on a fluoroscopic image, and displays the three-dimensional image of the blood vessel as 3 display rotated separately from the dimensional road map image, with a display hand stage on the basis of a user instruction for displaying the rotation of the 3-dimensional image of the blood vessel is stopped, the display means, the orientation of the blood vessel A three-dimensional image of the blood vessel when the position of the arm related to is changed by a preset angle is displayed .

  According to the present invention, when the shape of a blood vessel such as a blood vessel bifurcation is difficult to see with only a three-dimensional road map image, the shape of the blood vessel can be easily seen.

It is explanatory drawing for demonstrating the 3D road map interlocking | linkage image display by the digital fluorography apparatus concerning a present Example. It is a functional block diagram which shows the structure of the digital fluorography apparatus concerning a present Example. It is a figure which shows the structural example of a display part and an operation part. It is a functional block diagram which shows the structure of a 3D road map display control part. It is a flowchart which shows the process sequence of the 3D road map display control process by a 3D road map display control part. It is a figure which shows an example of the 3D road map image displayed on a fluoroscopic monitor, and the side image displayed on a reference monitor. It is explanatory drawing for demonstrating rotation of the image using a joystick. It is a figure which shows an example of a side surface display arm angle difference table. It is a figure which shows an example of 3D road map.

  Exemplary embodiments of an X-ray imaging apparatus and a three-dimensional road map interlocking image display method according to the present invention will be described below in detail with reference to the accompanying drawings. In this embodiment, the case where the present invention is applied to a digital fluorography apparatus will be mainly described.

  First, 3D roadmap interlocking image display by the digital fluorography apparatus according to the present embodiment will be described. FIG. 1 is an explanatory diagram for explaining 3D roadmap-linked image display by the digital fluorography apparatus according to the present embodiment. FIG. 4A shows a 3D road map blood vessel image, and FIG. 4B shows an image when the blood vessel of FIG.

  In the 3D roadmap image shown in FIG. 5A, the blood vessel appears to be unbranched, but in reality, the blood vessel is branched as shown in FIG. Therefore, in the digital fluorography apparatus according to the present embodiment, a 3D image in which the arm position of the mask image differs from the 90-degree arm position is displayed on another monitor in conjunction with the display of the 3D roadmap image.

  In this way, in conjunction with the display of the 3D roadmap image, the 3D image in which the arm position of the mask image differs from the 90 ° arm position is displayed on another monitor, so that the shape of the blood vessel can be grasped only by the 3D roadmap image. Even when it is difficult, it is possible to easily grasp the shape of the blood vessel by the image displayed on another monitor.

  Next, the configuration of the digital fluorography apparatus according to this embodiment will be described. FIG. 2 is a functional block diagram illustrating the configuration of the digital fluorography apparatus according to the present embodiment. As shown in the figure, the digital fluorography apparatus 100 detects image data by detecting an X-ray generator 1 that generates X-rays to be irradiated to a patient 45 on a bed 17 and X-rays transmitted through the patient 45. The X-ray detection unit 2 to be generated, the arm 5 that holds the X-ray generation unit 1 and the flat detector 21, the mechanism unit 3 that moves the bed 17, and the height required for the X-ray generation unit 1 to generate X-rays. The high voltage generation unit 4 that supplies voltage, the mechanism control unit 6 that controls the mechanism unit 3, the image data generated based on the X-rays detected by the X-ray detection unit 2, and the image data It has an image processing unit 7 for storing, a display unit 8 for displaying an image, an operation unit 9 for receiving an operation by an operator (user), and a system control unit 10 for controlling the entire digital fluorography apparatus 100.

  The X-ray generation unit 1 irradiates the X-ray tube 15 that generates X-rays using the high voltage supplied from the high-voltage generation unit 4 and shields a part of the X-rays generated by the X-ray tube 15. And an X-ray restrictor 16 for controlling the field.

  The X-ray detection unit 2 converts the X-ray transmitted through the patient 45 into electric charges and detects them, a gate driver 22 that extracts electric charges from the flat detectors 21, and electric charges detected by the flat detectors 21. And an image data generation unit 11 for generating image data from the image data. The image data generation unit 11 includes a charge / voltage converter 23 that converts the charge detected by the flat detector 21 into a voltage, and an A / D converter that converts the voltage converted by the charge / voltage converter 23 into a digital value. 24 and a parallel / serial converter 25 for converting the parallel output of the A / D converter 24 into a serial output.

  The mechanism unit 3 includes an arm moving mechanism 41 that moves the arm 5 based on an instruction from the mechanism control unit 6, and a bed moving mechanism 42 that moves the bed 17 based on an instruction from the mechanism control unit 6. The image processing unit 7 includes an image calculation unit 12 that performs reconstruction calculation and subtraction calculation on the image data generated by the image data generation unit 11, an image data storage unit 13 that stores image data, and a display of a 3D road map. A 3D roadmap display control unit 50 for controlling Details of the 3D road map display control unit 50 will be described later.

  The display unit 8 includes a display image memory 31 that holds display image data, a D / A converter 32 that converts image data in the display image memory 31 into an analog signal, and an output of the D / A converter 32. A display circuit 33 that performs a corresponding display on the monitor 34 and a monitor 34 are provided.

  FIG. 3 is a diagram illustrating a configuration example of the display unit 8 and the operation unit 9. As shown in the figure, in this configuration example, the monitor 34 includes a fluoroscopic monitor 34 a that displays a fluoroscopic image, a reference monitor 34 b that displays a 3D-VR image such as a collected image or a mask image, and the digital fluorography apparatus 100. The system monitor 34c displays messages to be output. The operation unit 9 includes a main console provided with operation buttons and a joystick, a keyboard used for character input, and a mouse used for instructions from a monitor screen. Here, the 3D road map image is displayed on the fluoroscopic monitor 34a, but may be displayed on the reference monitor 34b.

  Next, the 3D road map display control unit 50 will be described. FIG. 4 is a functional block diagram illustrating a configuration of the 3D road map display control unit 50. As shown in the figure, the 3D road map display control unit 50 includes an operation receiving unit 51, a mask image display control unit 52, a side image search unit 53, a 3D road map processing unit 54, and a side image display control. Part 55. The 3D road map display control unit 50 is implemented as software that operates on a CPU included in the image processing unit 7.

  The operation accepting unit 51 is a processing unit that receives information related to the operation of the operator from the operation unit 9 and distributes the information to a functional unit that performs processing corresponding to the operation. For example, the operation accepting unit 51 notifies the mask image display control unit 52 that the mask image display request has been made by the operator, and if the mask image is designated by the operator, the mask image has been designated. When the side image search unit 53 is notified and the start of the 3D road map is specified by the operator, the 3D road map processing unit 54 is notified that the 3D road map start is specified.

  The mask image display control unit 52 is a processing unit that displays a 3D-VR image as a mask image candidate when notified from the operation reception unit 51 that a mask image display request has been made. The operator designates a mask image from the 3D-VR image displayed by the mask image display control unit 52.

  When notified from the operation reception unit 51 that the mask image has been designated, the side image search unit 53 acquires the current arm angle, that is, the arm angle of the mask image, from the mechanism control unit 6 via the system control unit 10. Then, the image data storage unit 13 is searched for a three-dimensional image in which the acquired arm angle is different from the 90-degree arm angle.

  When this side image search unit 53 is notified that a mask image has been designated, it acquires the current arm angle and searches the image data storage unit 13 for a three-dimensional image in which the current arm angle is different from the 90 ° arm angle. By doing so, it is possible to display on the reference monitor 34b an image having a 90-degree arm angle different from that of the three-dimensional road map image.

  When the 3D road map processing unit 54 is notified by the operation receiving unit 51 that the 3D road map start is designated, the 3D road map processing unit 54 displays the 3D road map on the fluoroscopic monitor 34 a and also displays the side image display control unit 55. The side image search unit 53 is a processing unit that instructs to display the side image searched from the image data storage unit 13.

  The side image display control unit 55 is a processing unit that displays the side image searched by the side image search unit 53 on the reference monitor 34 b based on an instruction from the 3D road map processing unit 54.

  Next, a processing procedure of 3D road map display control processing by the 3D road map display control unit 50 will be described. FIG. 5 is a flowchart showing a processing procedure of 3D road map display control processing by the 3D road map display control unit 50.

  As shown in the figure, in this 3D road map display control process, the 3D road map display control unit 50 receives the designation of a 3D image as a mask image from the operator by the operation receiving unit 51 and sends it to the side image search unit 53. Notification is made (step S1). Then, the side image search unit 53 acquires the current arm position and searches the image data storage unit 13 for an image at an arm position that is 90 degrees different from the current arm position (step S2).

  When the operation receiving unit 51 receives an instruction to start the 3D road map from the operator and notifies the 3D road map processing unit 54, the 3D road map processing unit 54 displays the 3D road map image on the fluoroscopic monitor 34a (step S3).

  The 3D road map processing unit 54 instructs the side image display control unit 55 to display a side image, and the side image display control unit 55 searches for the side image searched by the side image search unit 53 from the image data storage unit 13. The information is displayed on the reference monitor 34b (step S4).

  FIG. 6 is a diagram illustrating an example of a 3D road map image displayed on the fluoroscopic monitor 34a and a side image displayed on the reference monitor 34b. In this example, an image with RAO = 0 and CRA = 0 is displayed on the fluoroscopic monitor 34a, and an image with RAO = 90 and CRA = 0 is displayed on the reference monitor 34b.

  In this way, the side image display control unit 55 displays the side image searched by the side image search unit 53 from the image data storage unit 13 on the reference monitor 34b, thereby identifying the blood vessel form such as a branching unit without an arm operation. It can be displayed easily.

  As described above, in this embodiment, the side image search unit 53 of the 3D road map display control unit 50 acquires the current arm position, and an image in which the current arm position is different from the 90-degree arm position is used as the side image. Retrieving from the data storage unit 13, the 3D road map processing unit 54 displays the 3D road map image on the fluoroscopic monitor 34 a, and the side image display control unit 55 refers to the side image based on the instruction of the 3D road map processing unit 54. Since it is displayed on 34b, it is possible to make it easy to grasp the shape of the blood vessel by the side image even when the blood vessel overlaps and it is difficult to grasp the shape of the blood vessel only by the 3D road map image.

  In the present embodiment, the case where an image having a current arm position different from the 90-degree arm position is displayed on the reference monitor 34b has been described. However, the present invention is not limited to this, and a predetermined value other than 90 degrees is used. The same can be applied to the case where images with different arm positions by angles are displayed on the reference monitor 34b. The predetermined angle can be freely changed by setting.

  In addition, an image in which the current arm position is different from the 90-degree arm position is displayed on the reference monitor 34b, and the operator can specify an image at an appropriate angle by rotating the image using a joystick as shown in FIG. It can also be done.

  It is also possible to display a rotating image on the reference monitor 34b and stop the rotation according to the operator's designation. Then, when an image of an appropriate arm angle is obtained, the designation from the operator is accepted, and the difference from the actual arm angle corresponding to the part displayed in the image is shown as a side display arm angle as shown in FIG. When the 3D road map is to be stored for the same part next time, the image that differs from the actual arm angle by the arm angle stored in the side display arm angle difference table is stored in the reference monitor 34b. It can also be displayed automatically.

  In the present embodiment, the case where a 3D-VR image (mask image) is displayed on the reference monitor 34b of the digital fluorography apparatus 100 has been described. However, the present invention is not limited to this, and for example, a mask image Is stored and displayed on the 3D workstation, and the mask image and the side image are displayed on the digital fluorography apparatus 100 by transmitting the selected mask image and the retrieved side image data to the digital fluorography apparatus 100 on the 3D workstation. The same applies to the display. By displaying the mask image on the 3D workstation, it is possible to display the mask image using the excellent 3D processing and 3D display capability of the 3D workstation.

  In this embodiment, the digital fluorography apparatus has been described. However, the present invention is not limited to this, and can be similarly applied to an apparatus that monitors a subject using X-rays.

  As described above, the X-ray imaging apparatus and the three-dimensional road map interlocking image display method according to the present invention are useful for an X-ray apparatus having a three-dimensional road map function, Suitable for roadmap.

DESCRIPTION OF SYMBOLS 1 X-ray generation part 2 X-ray detection part 3 Mechanism part 4 High voltage generation part 5 Arm 6 Mechanism control part 7 Image processing part 8 Display part 9 Operation part 10 System control part 11 Image data generation part 12 Image calculation part 13 Image data Storage unit 14 Image display control unit 15 X-ray tube 16 X-ray diaphragm 17 Bed 21 Planar detector 22 Gate driver 23 Charge / voltage converter 24 A / D converter 25 Parallel / serial converter 31 Display image memory 32 D / A converter 33 display circuit 34 monitor 34a fluoroscopic monitor 34b reference monitor 34c system monitor 41 arm moving mechanism 42 bed moving mechanism 45 patient 50 3D road map display control unit 51 operation receiving unit 52 mask image display control unit 53 side image search unit 54 3D roadmap processing unit 55 Side image display control unit 100 Digital Fluoro Rography equipment

Claims (9)

An X-ray diagnostic apparatus having a three-dimensional road map function,
First display means for displaying a three-dimensional road map image in which a three-dimensional image of a blood vessel is superimposed on a fluoroscopic image;
Second display means for rotating and displaying the three-dimensional image of the blood vessel separately from the three-dimensional roadmap image;
Receiving means for receiving an instruction to stop rotation of the three-dimensional image of the blood vessel;
When a stop instruction is received by the receiving means, the arm angle related to the direction of the blood vessel is correlated with the direction of the blood vessel displayed in the three-dimensional image of the blood vessel when the stop instruction is received Storage means for storing the difference between the angle of the arm related to the direction of the blood vessel displayed in the three-dimensional road map image;
An X-ray diagnostic apparatus comprising:   The X-ray diagnostic apparatus according to claim 1, wherein the second display unit displays a three-dimensional image of a blood vessel rotated according to a user instruction using a joystick.   The said 2nd display means displays the three-dimensional image of the said blood vessel by the angle based on the difference memorize | stored in the said memory | storage means at the time of the next three-dimensional road map execution. 2. The X-ray diagnostic apparatus according to 2.   The said 2nd display means displays the three-dimensional image of the said blood vessel when the position of the arm which concerns on the direction of the said blood vessel is changed by the preset angle, The said blood vessel is characterized by the above-mentioned. X-ray diagnostic equipment.   The X-ray diagnostic apparatus according to claim 4, wherein the set angle is 90 degrees. An X-ray diagnostic apparatus having a three-dimensional road map function,
A three-dimensional road map image in which a three-dimensional image of a blood vessel is superimposed on a fluoroscopic image is displayed, and the three-dimensional image of the blood vessel is rotated and displayed separately from the three-dimensional road map image. Display means for performing display in which the rotation of the three-dimensional image of the blood vessel is stopped ;
The X-ray diagnostic apparatus characterized in that the display means displays a three-dimensional image of the blood vessel when the position of the arm related to the direction of the blood vessel is changed by a preset angle .   The X-ray diagnostic apparatus according to claim 6, further comprising a rotating unit that rotates a three-dimensional image of the blood vessel displayed by the display unit based on a user instruction.   The X-ray diagnostic apparatus according to claim 7, wherein the rotation unit rotates a three-dimensional image of a blood vessel displayed by the display unit based on a user instruction using a joystick. The X-ray diagnostic apparatus according to claim 6, wherein the set angle is 90 degrees.